What is the engine displacement of the 1954 Ariel MK 2 Square Four?

The 1954 Ariel MK 2 Square Four has an engine displacement of 997.0 ccm (60.84 cubic inches).

1954 Ariel MK 2 Square Four Price, Specs, Review

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Review

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The 1954 Ariel MK 2 Square Four embodies classic British motorcycle design from the mid-1950s. Its 997cc square four engine delivered a smooth and unique riding experience, owing to its distinctive engine configuration. The square four design, with its paired transverse cylinders, set it apart from more conventional motorcycles of the time. The MK 2 was designed with touring in mind, offering a comfortable and relatively upright riding position. A generous 6.08 US gallon fuel tank provided a long range between fuel stops, a practical feature for extended journeys. The front brake was an expanding drum brake, requiring careful modulation and anticipation, typical of the braking technology of the era. This motorcycle appeals to collectors and enthusiasts of vintage British motorcycles who appreciate the distinctive engineering of the square four engine. It represents a significant piece of motorcycling history and offers a glimpse into the riding experience of the 1950s.

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License Class (EU)

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Rule of thumb: under 125cc / 15HP → A1, under 47HP → A2, above → A.

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Fuel Economy & Running Costs

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Estimated average for 997cc class: 35-50 mpg (5.0-7.0 L/100km)

⛽ Tank: 23.00 litres (6.08 US gallons)

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Insurance Class

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